question Re: Nifi counters just an empty list in Support Questions

Nifi counters just an empty list

Fredi — Mon, 29 Jul 2024 13:11:29 GMT

Hello there,

I learned about nifi counters, but when I open my nifi instance and click on the counters button in the main menu, it just opens an empty list. Same when I call nifi-api/counters. It is just an empty list. I do have processors and processgroups running.

So does anyone have an explanation why that is? I use nifi 1.23.2 on my local machine. Thanks in advance!

Re: Nifi counters just an empty list

MattWho — Mon, 29 Jul 2024 14:13:42 GMT

@Fredi

I am not completely clear on your question here.

Unless you have a dataflow built and running that has implemented some counter, then nothing is going to show in the NiFi Counters UI.

But once you have components running like UpdateCounter, the counter UI would get populated:

NiFi counters do not persist through a NiFi restart. After a restart the Counters UI will be blank again until a counter is generated by component that writes to a counter.

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Thank you,
Matt

Re: Nifi counters just an empty list

Fredi — Tue, 30 Jul 2024 13:00:38 GMT

Hi Matt, thank you for your quick response. I thought that all processors have a built in counter, so I expected to see some no matter what processors are running.